diff --git a/js/main.js b/js/main.js
index b7138d99..6bdbbc3e 100644
--- a/js/main.js
+++ b/js/main.js
@@ -547,6 +547,11 @@ var MM = (function () {
 				return;
 			}
 
+			if (!module.data.position) {
+				Log.warn("module tries to update the DOM without being displayed.");
+				return;
+			}
+
 			// Further implementation is done in the private method.
 			updateDom(module, speed);
 		},